Gear help - JeepForum.com

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post #1 of 19 Old 11-08-2013, 09:56 AM Thread Starter
JeepRookie11
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Gear help

Hi all I purchased my first jeep not to long ago. It came with some mods already and I currently am running 33" tires with a 4" lift. I don't know a lot about jeeps yet but have been reading a lot on this forum. I am trying to figure out what gears I have in my jeep currently. In 5th gear at 65 mph I am running at 2250 rpm.
Oh and I have a 2006 TJ X - 4.0L 6spd. Any help would be great!

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post #2 of 19 Old 11-08-2013, 10:12 AM
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post #3 of 19 Old 11-08-2013, 11:03 AM Thread Starter
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Thank you for the reply. I found a tag on the front and believe I have the 3.07 gears. I recently had a shop near by inspect my jeep and one of the things they told me that needed to be done was to rebuild the rear axle due to some bearing wear. IDK how they figured that out I haven't had any problems and I haven't heard any noise coming from back there. My thought was if I do in fact need to do that then I mine as well regear possibly 4.56 gears and upgrade the axles front and rear. I was also thinking I would go with the eaton e-lockers f/r. What would be the best way to upgrade my axles. Buy all the parts and have someone install them or would it be better money spent on buying a front and rear axle already fully assembled?

I do take the jeep on trails every now and then but it mostly is an around town driver with the occasional road trip. Very few miles are put on in
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post #4 of 19 Old 11-08-2013, 12:33 PM
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Do a bunch of research on here...you will hear that from everyone. That will help you decide ultimately what axles and gear ratios you want to run. You will hear a lot of people flame your D35 rear axle, especially wanting to move up to 35's some day.

My advice is to do your homework and have a solid plan before spending a dime. You will learn a LOT on here. If in doubt, ask questions.
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post #5 of 19 Old 11-08-2013, 01:18 PM
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If you do some quick research you'll probably also find that 4.56 is good for the 5-speed with 33s but if you have the 6-speed, for daily driving you might want to consider 4.10. That's what I have and it's perfect for me. Can still drive at 75mph without the engine screaming and 1st is still usable on the street, though I can still start in 2nd. Just a suggestion.

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post #6 of 19 Old 11-08-2013, 03:00 PM Thread Starter
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Thanks yea most of the threads I read people were going back and forth about 4.56 and 4.88. I haven't seen Much on the 4.10 ratio but I'll start looking for that. My original plan was to go with the super 35 kit and regear. Then I started looking at all the pre-assembled G2 Dana 44's and thought I might go with those because they are stronger and I could possible install those myself instead of blowing money on having a shop install everything. Haha and I know exactly what you are saying before I buy anything I do loads of research first. The problem is all the good stuff is super expensive.
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post #7 of 19 Old 11-08-2013, 04:14 PM
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Quote:
Originally Posted by JeepRookie11 View Post
... My original plan was to go with the super 35 kit and regear. Then I started looking at all the pre-assembled G2 Dana 44's and thought I might go with those because they are stronger and I could possible install those myself instead of blowing money on having a shop install everything. Haha and I know exactly what you are saying before I buy anything I do loads of research first. The problem is all the good stuff is super expensive.
This is what I did, spec'd up and shipped to my door for $1600
http://eastcoastgearsupply.com/i-276...-assembly.html

EDIT: it was about $500 extra for me because I added the SYE/DS package.

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post #8 of 19 Old 11-08-2013, 04:38 PM Thread Starter
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Hmm yea I have seen people talk about the 8.8 but I'll have to look into that more. I would still need to upgrade my front axle correct? I've been told the standard d30 will be fine for 35's but then again shops don't not everything.
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post #9 of 19 Old 11-08-2013, 08:41 PM
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Quote:
Originally Posted by JeepRookie11 View Post
Hmm yea I have seen people talk about the 8.8 but I'll have to look into that more. I would still need to upgrade my front axle correct? I've been told the standard d30 will be fine for 35's but then again shops don't not everything.
The 8.8 is generally stronger than the d44 so this would be something good to consider. I installed mine in my driveway with a skateboard to roll it, jack stands, and sockets/torque wrench. Very easy, bolted right in.
Yes you''ll need to gear the front axle to match and yes lot's of guys run 35s on the d30 even with stock shafts. Because you're in 2wd most of the time the front axle doesn't see nearly as much abuse.

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post #10 of 19 Old 11-09-2013, 05:07 AM Thread Starter
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Cool that helps alot thanks. Now time to save some money
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post #11 of 19 Old 11-09-2013, 05:13 AM
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Quote:
Originally Posted by willatthe4077th View Post

The 8.8 is generally stronger than the d44
What evidence is there of this?

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post #12 of 19 Old 11-09-2013, 06:24 AM
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Quote:
Originally Posted by biffgnar View Post
What evidence is there of this?
fourwheeler magazine gave even the 27 spline 8.8 higher torque ratings then the d44

Quote:
Axle shaft Strength and output torque rating by Warn and 4 Wheeler

The axle shaft strength tested by Warn Ind:
F8.8= 6,500 (lb. ft.)
D44= 4,600-5,000 (lb. ft.)
D35C= 4,000-4,300 (lb. ft.)


COT: Continuous output torque rating
MOT: Maximum output torque rating

(Numbers from January 08 edition of Fourwheeler, page 60.)
Dana 35 rear axle COT: 870 MOT: 3480
Dana 44 rear axle COT: 1100 MOT: 4460
Ford 8.8 28spline COT: 1250 MOT: 4600
Ford 8.8 31spline COT: 1360 MOT: 5100
Dana60 semifloat COT: 1500 MOT: 5500]
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post #13 of 19 Old 11-09-2013, 07:14 AM
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Quote:
Originally Posted by Eckoh View Post
fourwheeler magazine gave even the 27 spline 8.8 higher torque ratings then the d44
Interesting, although would be nice to see from a source one could consider reliable.

#feelthejohnson
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post #14 of 19 Old 11-09-2013, 08:34 AM
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it is refreshing to see somebody actually back up a claim with data lol
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post #15 of 19 Old 11-09-2013, 08:48 AM
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Quote:
Originally Posted by Hosejockey61 View Post
it is refreshing to see somebody actually back up a claim with data lol
but then the resident forum elitest still had something snide to say about it...

I guess warn is not "reputable"
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